Henry l



UNITED STATES PATENT OFFICE.

HENRY L. MESERVEY, OF BOSTON, MASSACHUSETTS, ASSIGNOB, BY MESNEASSIGNMENTS, TO HOWARD TILDEN.

FLOUR-SIFTER.

Specification forming part of Letters Patent No. 51,657, dated December19, 1865.

To all whom it may concern:

Be it known that I, HENRY L. MEsERvEY, of Boston, in the county ofSuft'olk and State of Massachusetts, have invented an ImprovedFlour-Sitter, of which the following is a full, clear, and exactdescription, reference being had to the accompanying drawings, making apart of this speciication, in which-- Figure 1 is a perspective view ofmy improved sifter. Fig. 2 is a central longitudinal section through thesame. Fig. 3 is a transverse section through the same on the line xx ofFig. 2.

My invention hasfor its object to produce an eective sitter of simpleconstruction ,which can be furnished at a low cost; and it consists in abox or hopper provided with a sieve and containing a revolving framecarrying a series of.

olls, by which arrangement the operation of sifting is performed in arapid and effectual nanner.

To enable others skilled in the art to understand and use my invention,I will proceed to describe the manner in which I have carried it out.

In the said drawings, Ais a box or hopper, ofthe form seen in Fig. 1,which is supported on the legs a, and has attached to its lower end asieve, B, of acurved form, as seen in Fig. 3.

O is a shaft, which has its bearings in the .ends of the box A, and isrevolved by means of a handle, b. This shaft carries at each end atriangular piece or frame, D, of the form seen in Fig. 3, between whichand parallel to the shaft C are supported the rollers E, the journ alsof which rest in slots d in the pieces D, so as to allow the rolls toyield toward the center, and thus prevent them from being obstructed vby or crushing any hard substance or impurity constantly pressed outwardfrom the center, 'and allow of their yielding on coming into contactwith any obstruction in the article being sifted.

The operation of this sitter is as follows The iiour or other article tobe sitted is placed in the boX A and the handle b turned so as torevolve the frame and rollers E, which agtate the tlour in its descent,breaking up the lumps and rubbing it across the sieve, causing the finerparticles to pass rapidly through.

A sifter constructed as aboye described is always clean and pure, noleather, rubber, or other article likely to impart a bad taste beingemployed in the interior, and performs its work in a thorough andexpeditious manner.

I am aware that a quadrilateral shaft having strips of rubberprojectingfrom its angles,

has been used in connection with a box and sieve; but my inventiondift'ers from this, as my rolls are permitted to yield radially, andalso turn von their axes to enable them the more easily to pass overlany hard substance without dragging it over the surface ot' the sieve.

What I claim as my invention, and desire to secure by Letters Patent,is-

Arevolvin g frame carrying a series of rollers, E, in combination with abox or hopper,A,and sieve B, substantially as and for the purpose setforth.

HENRY L. MESERVEY. Witnesses:

P. E. TEsoHEMAcHER, N. W. STEARNS.

